Number of 2 X 2 matrices having entries in {0,1,...,n} and determinant in the closed interval [-n,n] with no entry repeated.

A279063

Number of 2 X 2 matrices having entries in {0,1,...,n} and determinant in the closed interval [-n,n] with no entry repeated.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =16a(4) =56a(5) =136a(6) =296a(7) =512a(8) =864a(9) =1280a(10) =1912a(11) =2616a(12) =3680a(13) =4760a(14) =6200a(15) =7848a(16) =9792a(17) =11832a(18) =14632a(19) =17280a(20) =20784a(21) =24352a(22) =28480a(23) =32584a(24) =38200a(25) =43168a(26) =49160a(27) =55472a(28) =62936a(29) =69784

External references